I am doing a project in PIC Microcontroller in which I need to know, which basic/advanced version of PIC controller to be used? My program aim is as follows.

I Planned to control the O/P Voltage of the Transformer automaticallythrough PIC Micro Controller.

This Process involves setting a reference voltage(Which is settableand can be with Password Protection). This Voltage can be comparedwith the Transformer O/P Voltage.Based on the comparison result anactuation signal to be triggered to actuate OLTC to raise the tap sothat automatic control can be obtained.